Attachment for airbrushes



Ap 1951 CHASAN ETAL 2,550,404

ATTACHMENT FOR AIR BRUSHES Filed June 19; 1947 .7 2 Sheets-Sheet 1 ATTOKNE'Y April 1951 l. C HASAN ET AL 2,550,404

ATTACHMENT FOR AIR BRUSHES Filed June 19, 1947 2 Sheets-Sheet 2YIIII'III) BY 5/ 01v 01,45 411! rO-ZWW ATTORNEY Patented Apr. 24, 1951ATTACHMENT FORAIRBRUSHES Isaac 'Chasan, George Chasan, and Simon*Chasan, Brooklyn, N. Y

Application June 19, 1947, Serial No. 755,793

Claims.

This invention relates to air brushes such as are used'by artists, andaims to provide certain new and useful improvements therein whereby thegeneral efiiciency, utility and convenience of the user, are enhanced.

A" further object of the invention is the provision of an attachment forair brushes by means of which the jar containing the paint or color maybe readily attached to or removed from the brush and another jarcontaining a dilferent color may be as readily attached in its place.

The above general as well as additional and more specific objects willbecome apparent in the following description, wherein characters ofreference refer to like-numbered parts in the accompanying drawings. Itis to be noted that the drawings are intended for the purpose ofillustration only, and that it is neither desired nor intended to limitthe invention necessarily through the medium of the attachment of thisinvention, in slightly modified form.

Fig. 4 is a fragmentary side'elevational view of the air brush and jarof Fig. -3, but utilizing the attachment substantially in the formillustrated in' Fig. l. 1

Fig. 5 is a, plan view of the device shown in Fig. 3 with the air brushin its entirety omitted, thus illustrating only the jar and theattachment which inthis form is fixed to the cap of the jar.

Fig. 6 is a sectional view taken on the line 66 of Fig. 5. a i

"Fig. 7 is a sectional view takenon the line 11 of Fig. 1.

- Fig. 8 is a perspective view of the jar per se which is shown in Fig.4.

' Fig. 9 is a perspective view of one member of the two-part attachmentshown in Fig. 4 and which, except for the omission of a hole through oneside thereof, is also a perspective view of the corresponding one memberof the two-part attachment shown in Figs. 1, 2, and 7.

Fig. 10 is a side elevational view of the air brush per se from whichthe normal conical tip has been unscrewed and in place of which aspot-55 A cylindrical sleeve 29 which is split tudinally -along the slit 30,has knurled flangesting attachment has.been-substituted. 1

2 Fig. 11 is a front end view of the air brush of Fi 10. i

Fig. 12 is a fragmentary View similar to Fig. 10, showing only the frontend of the air brush, with the spotting attachment above-referredtoremoved.

Fig. 13 is a front end view of Fig. 12.

Fig. 14E is a sectional view taken on the line I l-l4 of Fig. 11.

Fig. 15 is a sectional view taken on the line l5l5 of Fig. 14.

Fig. 16 is an enlargement of a fragment of Fig. 7.

Referring in detail to the drawings, the numeral I0 indicates a standardair brush having the usual pivoted trigger l I whose swing is adjustablycontrolled by the set screw l2 supported in a standard 3. The barrel ofthe brush is shown at M and the air attachment at l5. As theconstruction of air brushes is well known, no detailed descriptionthereof will here be given, and the description will be limited to thoseparts which are essential to an understanding of the instant invention.

Air brushes commonly operate on the injector principle, that is, air isforced transversely past an opening into a liquid container within thebarrel so that the liquid and air emerge in astream from the nozzle Hi.When a jar is used to hold the liquid, and this is generally desirableas there is the ever present danger of spilling the liquid when it iscontained in an open cup, it is desirable that the jar be made asreadily attachable and detachable as possible, and this desirablefeature is a characteristic of this invention. The jar I1 is a standardjar but its cap is of novel construction. The cap l8, which is screwedon the jar by means of screw threads, not shown, has a member I9 securedthereon by any suitable means or in any desired manner, as, for example,by means of solder 20. The member I9 is a support in the shape of astrip having its lateral extremities turned up and inward to provideguide rails 2|. A tube 22 is mounted on the cap I8 about an openingthrough the cap and in alignment with the longitudinal median line ofthe member [9; an extension or suction tube 23 extends from the tube 22toward the bottom of the jar. The upper end of the tube 22 is closed bya screw 24, the lower end of which is adapted. I to vary the degree ofopening of an outlet 25' into an exit nipple 26, this nipple being rigidwith the tube 22. The barrel M has an opening 2! into' the centralpassage 28 of the brush. I

longi- 3| and 32- at its ends. Secured to, or formed integrally with,the underside of the sleeve 29 adjacent one end thereof, is a slideblock 33 having transverse grooves 34 thereby forming flanges 35 at thebottom of the block. It is obvious that the sleeve 29 may be attached tothe cap l8 by registering the rails 2| in the grooves 34 and sliding theblock on the said member. The sleeve '29 has an opening 36 through oneside thereof, receptive of the nipple 25.

In use, the sleeve 29 is first slid over the front end of the barrel M,with the opening 36 thereof on the same side as the opening 21 of thebarrel, and when pushed home, these openings are in alignment. Thesurfaces 38 of the split 31 in the flange 32-, which is a continuationof the slit 30 of the sleeve, are slightly beveled to permit the head ofthe set screw I2 to ride over these surfaces as the sleeve gets homeagainst the standard I 3. Owing to the obvious slight resiliency of theflange 32, the ends at the split 3! are slightly spread by the screwhead and after the head has passed them they retract,

thus providing a means for releasably retaining the sleeve 29 on thebrush barrel and thus preventing it from slipping off. With the sleeve29 thus mounted on the barrel, the jar I1 is secured in place by slidingthe block 33 along the member is in the manner described, whence thenipple 26 passes through the aligned openings 35 and 21 so that its openend lies in the barrel passage 28. To provide a frictionalholding'engagement of the sleeve and block assembly on the jar cap, theinturned rails 2| may possess a sufficient resiliency, but suchfrictional engagement may also be provided by tapering the rear portionof the nipple 26 as shown at 26a so that ihe farther the nipple entersthe sleeve 29 the tighter is the fit of the nipple in the sleeve.

The same attachment, comprising the same parts with the one exceptionthat the sleeve 29a lacks the hole 36, is shown in Fig. 4 applied to ajar to be used in the manner of an atomizer spray, Ila. Parts in thisfigure which are equivalent or identical to those previously described,bear the same reference numeral followed .by the letter a, except forthe air brush which is in all respects the same as the brush ll! of Fig.l. The cap in this case, shown at 18a, has the atomizer nozzle 39, andthe member 19a is positioned at right angles to an imaginary diameterdrawn through the axis of this nozzle, instead of longitudinally as inthe case of the tube 22 above described. It is apparent that theattachment as applied in Fig. 4 serves the function of enabling the airbrush to utilize a spray discharge, which is useful in some phases ofair brush work.

In the form shown in Figs. and 6, the sleeve 2%, which is otherwiseidentical to the sleeve 28a, is fixed to'a support 40 which itselfisfixed on the cap 131), substantially as shown. In this case :the airbrush I0 is simply attached to or detached irom the jar cap l8b byinserting its forward end into the sleeve 2% until the head of the screwi2 has ridden over the flange 32b. The iar, not shown, to which the cap1% is attached, also serves as an atomizer, like the jar Ha. It is to benoted that, since the sleeves 2 9a and 29b lack the hole 36, when theyare mounted on the barrel of the brush they cover up and close theopening 2.! throu h the barrel.

In Figure 12 is shown the forward end of the brush 49. after the nozzlecap 4| has been unscrewed, and the wall 42 which serves as a baifie tothe passage 28, has, a plurality of openings or passages 43therethrough. A pin 44 is mounted on the barrel l4 at the properposition so that when a friction sleeve 45 having the bayonet slot 46therein, is pushed home, the sleeve will stop substantially at theposition shown in Figs. 10 and 1e. Internally the forward end of thissleeve is of reduced diameter and threaded, shown at 4B, and a cap 41has its threaded flange 48 engaging the threads 46. This cap has anaxial passage 49 to accommodate the brush needle 50, and this passage 49has a shoulder 5| intermediate the length of the cap so that the passage49 on the other side of the shoulder is of larger diameter, shown at 52.An extension tube-like flange 53 extends integrally from the cap andsurrounds the passage 52. The outer rim of the flange 53 is wis'ened orflanged to give it sufficient area so that, when it registers againstthe wall 42 as shown in Fig. 14 it blocks the openings 43. By unscrewingthe cap 31 these openings are unblocked, and the degree of unscrewingdetermines the degree of freeing the openings 43 and thus controls thequality and quantity of fluid exiting through the exit from the passage49. This means permits of a very fine degree of adustment for theoperation of spotting with the air brush.

We claim:

1. In combination with an air brush having a barrel and a nozzle at oneend of the barrel, and a container having a cap secured thereto, meansfor releasably attaching said container to said barrel comprising amember secured to said cap and having longitudinal rails thereon, asleeve slidably mounted on said barrel, a second member secured to thebottom of said sleeve at right angles thereto and having longitudinalgrooves therein, said second member being slidably mounted in said firstmember with said rails registering in said grooves, said cap havin anopening therein and having an upright tube extending from said opening,said tube having a nipple thereon at right angles thereto, said barrelhaving an opening thereinto from one side thereof, said sleeve having anopening therethrough on th corresponding side thereof registrab-le withsaid barrel opening, said barrel having a limit stop to the rearwardmovement of said sleeve on said barrel over said nozzle, said barrel andsaid sleeve openings being so positioned as to align when said sleeve isslid against said limit stop, the axis of said tube lying in a verticalplane through said first member and equidistant r m sai r ils. ai lee ewhen mo nt on said barrel being so positioned that said nipple alignswith said barrel opening and said sleeve opening with said nippleregistering in said barrel opening and said sleeveopening.

2. The combination set forth in claim 1, having means partly on saidbarrel and partly on said sleeve for releasably locking said sleeve insaid limit stop position.

3. The combination set forth in claim 1, said sleeve having alongitudinal split therethrough thereby providing frictional grippingaction against said barrel.

4. The combination set forth in claim 1, said sleeve having alongitudinal split therethrough, said limit stop comprising a radialprojection on said barrel in alignment with said split, said sleevehaving a flange on that end thereof adjacent said projection, saidprojection having a setscrew screwed into the forward side thereof andhaving a head on said screw adapted to ride over the opposed sides ofthe split in said flange and thereby releasably spread said sides assaid sleeve is moved against said projection and to permit said sides ofsaid split flange to return to normal position after said head hasridden thereover whence said head releasably locks said sleeve againstforward movement.

5. In combination, an air brush including a barrel and an upstandingpivoted trigger pivoted on an axis at right angles to the axis of thebarrel, said barrel having a standard thereon positioned forward of saidtrigger, a set screw a cap thereon, means for attaching said containeron said barrel comprising a sleeve slidably mounted on said barrel andhaving a longitudinal split in the top thereof lying in the samevertical planeas said set screw, the walls of said split at the rear endof said sleeve being beveled thereby providing a tapering mouth at saidrear end of said split, the forward end of said set screw registeringfrictionally in said mouth upon push- REFERENCES CITED The followingreferences are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,166,522 Holton Jan. 4, 19161,218,685 Mollenhauer Mar. 13, 1917 1,429,537 Rothermund Sept. 19, 19221,604,252 Banfil Oct. 26, 1926 1,743,292 Tittemore Jan. 14, 19302,051,518 Cunningham Aug. 18, 1936 2,148,986 Hoyt Feb. 28, 19392,256,729 Thompson Sept. 23, 1941 FOREIGN PATENTS Number Country Date6,264 Great Britain Sept. 6, 1906 145,901 Switzerland June 1, 1931153,831 Great Britain Nov. 18, 1920

